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b12 injections for arthritis Hydroxocobalamin Injection: Vitamin Energy & Anemia — Mountainside Medical B12 Injections | Naturopath Ottawa| IBD link
Description
IBD link

Side effects are uncommon but may include mild soreness at the injection site or temporary redness

F.et al (2017)
It is possible that a deficiency of B12 could lead to disrupted sleep patterns

Side effects and cautions B12 has no established upper limit due to low toxicity, but injections can have side effects: Common: soreness, redness or swelling at the injection site